Step 1: Prep

You'll want to cover the surface area with something. I used a piece of fabric, which both kept junk off the carpet, and provided contrast so that pins and other small pieces didn't get lost.

Step 2: Frame

Since this was going to be a pretty heavy frame, I needed something that would be strong enough to hold it up. Wire doesn't come much thicker than 9 gauge (or at least I wasn't able to find any) so I opted for a 3' metal rod.

After bending it into shape, I cut lengths out of the 9 gauge wire, bending them and laying them out into the shape I wanted for the frame.

Step 3: Spines

Next I laid out the vertical spines on both sides, using 9 gauge wire. Once I was happy that they were mirrored on both sides in terms of length, curve, and spacing, I added the "ribs" also using 9 gauge wire.

The right side of this picture shows how your wings should look at this point, except nothing should be connected yet.

Thanks so much for posting the pictures! It made my day to see that you got use out of my instructable--they look great! It's cool that you could weld them--I always wanted to learn for projects like this.